Sennheiser EW-D CI1 SET Digital Wireless Instrument System Kit with Earset Microphone (R4-9: 552 to 607 MHz)

Professional Wireless Performance for Instruments and Voice

The Sennheiser EW-D CI1 SET Digital Wireless Instrument System with Earset Microphone is a flexible and professional-grade solution for both instrumentalists and presenters. This complete kit, available from B&H, includes the CI 1 instrument cable and a beige Senal UEM-155-35H-BE omnidirectional earset microphone, allowing you to switch easily between guitar, bass, or keyboard setups and high-clarity voice applications like lectures, theater, and public speaking.

Whether you're performing on stage, presenting in a lecture hall, or leading a worship service, this wireless system offers exceptional digital audio quality, intuitive controls, and a wide operating range, all backed by Sennheiser’s industry-leading technology.

Clean, Detailed Digital Audio with Ultra-Low Latency

At the heart of the system is Sennheiser’s 24-bit digital audio engine. With a wide frequency response of 20 Hz to 20 kHz and a stunning 134 dB dynamic range, the EW-D ensures your sound stays crystal clear, even with high-output instruments or vocals.

The ultra-low 1.9 ms latency means there’s no perceptible delay, making it ideal for live performers who need accurate, real-time monitoring. From quiet passages to loud crescendos, your tone stays clean and transparent.

CI 1 Instrument Cable and Rugged Bodypack Transmitter

For musicians, the included CI 1 cable connects your instrument’s 1/4-inch output to the bodypack transmitter’s locking 3.5mm jack. The EW-D SK bodypack transmitter is made with a lightweight metal chassis, built to withstand demanding stage environments. It features a lockable mute switch and supports Bluetooth Low Energy pairing from up to 120 feet away.

Power is flexible, run it on two AA batteries for up to 8 hours or upgrade to the BA 70 lithium-ion rechargeable battery for up to 12 hours of continuous operation (charging accessories sold separately).

Smart, Reliable, and Easy-to-Use Receiver

The half-rack EW-D EM receiver comes in a durable, all-metal housing with removable antennas. It features a high-contrast OLED display, easy front-panel navigation, and intuitive controls, making it accessible for users of any experience level.

Need to find a clean frequency? Use the auto-scan function, or pair it with the Sennheiser Smart Assist App to manage setup, monitoring, and frequency coordination right from your phone or tablet, no technical expertise required.

With both balanced XLR and unbalanced 1/4-inch outputs, it integrates seamlessly into PA systems, mixing boards, or A/V installations.

Advanced Wireless Reliability with Equidistant Tuning Grid

Designed for consistent and dropout-free performance, the EW-D features an equidistant tuning grid, a technology borrowed from Sennheiser’s top-tier Digital 6000/9000 series. This spacing eliminates intermodulation interference and allows you to operate up to 90 channels simultaneously, perfect for busy stages and venues with multiple performers.

The Intelligent Switching Diversity system monitors two antennas and seamlessly switches between them to maintain optimal audio quality. Operating in the UHF band, the EW-D avoids interference from common 2.4 GHz Wi-Fi networks for increased reliability.

Full App Control with Bluetooth and Smart Assist

The Smart Assist App makes configuring your wireless system easier than ever. Available for iOS and Android, this free app allows you to remotely manage settings, assign names to channels, monitor battery life, and more.

Control up to 16 channels per device, or more with additional devices, making this a scalable solution for larger productions. The app also includes video tutorials and guides to help you get started quickly.

If your phone isn’t available, all system features remain accessible from the receiver’s onboard controls.

Expand Your System as Your Needs Grow

The EW-D system is compatible with a range of Sennheiser microphones and transmitters. Choose from lavalier, headset, or handheld mic options to tailor the system to your unique performance or presentation needs.

For presenters, educators, and clergy:

• MKE 2 subminiature lavalier offers discreet, broadcast-level sound

• ME 2 omnidirectional lavalier captures sound evenly from all directions

• ME 4 cardioid lavalier reduces background noise and feedback

• ME 3 headset mic offers clarity and comfort for spoken word

For vocalists and stage performers:

• Add an EW-D SKM-S handheld transmitter, compatible with multiple dynamic and condenser capsules like the MMD 835, MMD 935, and more

Included: Senal UEM-155-35H-BE Earset Microphone for Clear Voice Capture

Also included in this bundle is the Senal UEM-155-35H-BE omnidirectional earset microphone, a professional-grade, lightweight mic designed for vocal clarity in live and spoken applications. It features:

• Flexible boom arm that can be worn on either ear for a custom fit

• 3.5mm locking connector for secure connection to Sennheiser transmitters

• Omnidirectional polar pattern that delivers consistent voice pickup

• High gain before feedback, ideal for loud environments and live amplification

• Included windscreen and clothing clip to reduce handling and wind noise

Its discreet beige finish makes it perfect for stage or presentation use, blending in seamlessly while delivering rich, natural audio.

The Complete Wireless System for Professionals

With its combination of instrument connectivity, vocal clarity, and intuitive setup, the Sennheiser EW-D CI1 SET with Senal Earset Microphone is the ultimate solution for performers and presenters looking for reliable wireless freedom, whether you're on stage or in front of a crowd.